Chris@18: <?php
Chris@18: 
Chris@18: namespace Drupal\jsonapi\Routing;
Chris@18: 
Chris@18: use Drupal\Core\Routing\RequestFormatRouteFilter;
Chris@18: use Symfony\Component\HttpFoundation\Request;
Chris@18: use Symfony\Component\Routing\RouteCollection;
Chris@18: 
Chris@18: /**
Chris@18:  * Sets the 'api_json' format for requests to JSON:API resources.
Chris@18:  *
Chris@18:  * Because this module places all JSON:API resources at paths prefixed with
Chris@18:  * /jsonapi, and therefore not shared with other formats,
Chris@18:  * \Drupal\Core\Routing\RequestFormatRouteFilter does correctly set the request
Chris@18:  * format for those requests. However, it does so after other filters, such as
Chris@18:  * \Drupal\Core\Routing\ContentTypeHeaderMatcher, run. If those other filters
Chris@18:  * throw exceptions, we'd like the error response to be in JSON:API format as
Chris@18:  * well, so we set that format here, in a higher priority (earlier running)
Chris@18:  * filter. This works so long as the resource format can be determined before
Chris@18:  * running any other filters, which is the case for JSON:API resources per
Chris@18:  * above.
Chris@18:  *
Chris@18:  * @internal
Chris@18:  */
Chris@18: final class EarlyFormatSetter extends RequestFormatRouteFilter {
Chris@18: 
Chris@18:   /**
Chris@18:    * {@inheritdoc}
Chris@18:    */
Chris@18:   public function filter(RouteCollection $collection, Request $request) {
Chris@18:     if (is_null($request->getRequestFormat(NULL))) {
Chris@18:       $possible_formats = static::getAvailableFormats($collection);
Chris@18:       if ($possible_formats === ['api_json']) {
Chris@18:         $request->setRequestFormat('api_json');
Chris@18:       }
Chris@18:     }
Chris@18:     return $collection;
Chris@18:   }
Chris@18: 
Chris@18: }